This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
AMSpectra. The frequencydomain spectrum of an amplitudemodulated signal The two sidebands are sum and difference frequencies of the carrier and modulator and and have amplitudes at half the amplitude of the carrier signal en Original uploader was Damien Karras at org en en Damien Karras Original upload log en AMSpectra Damien